화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.53, 192-200, September, 2017
DOI10.1016/j.jiec.2017.04.025  Export Citation
Zinc oxide nanopillars as an electrocatalyst for direct redox sensing of cadmium
Gaurav Bhanjana, Neeraj Dilbaghi, Nitin Kumar Singhal1, Ki-Hyun Kim2, †, and Sandeep Kumar†
  • Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India
  • 1National Agri Food Biotechnology Institute, Mohali, Punjab, India
  • 2Department of Civil & Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea
E-mail:,
In this paper, we report an ultrasensitive and selective technique for direct electrochemical sensing of cadmium (Cd) by zinc oxide nanopillars (ZONPs) synthesized using a facile chemical method. The synthesized ZONPs have been characterized in terms of their topological, morphological, elemental, structural, and optical properties using various microscopic and spectroscopic techniques. A gold electrode was modified with the as-synthesized ZnO nanostructures and utilized for direct redox sensing of Cd using cyclic voltammetry (CV) and chronoamperometric techniques. This fabricated sensor demonstrated excellent sensitivity and selectivity for direct redox sensing of Cd in real and laboratory samples. Using chronoamperometry, the developed sensor demonstrated ultra-sensitivity (10 mA cm -2 ppb -1) with a detection limit of 4 ppb (p-value < 0.0001, R-value > 0.99) in a linear range of 5-50 ppb. The enhanced reproducibility of the sensor in the presence of common interfering ions offers the potential for use in diagnostic applications involving food adulteration and in clinical healthcare.
Keywords:Sensor;Cadmium;Zinc oxide;Redox;Electrochemical
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